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arXiv 1209.0508quant-ph
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点分裂正则化对Casimir能量符号的影响

The effect of point split regularization on the sign of the Casimir energy

Dan Solomon

摘要:

在最近的一篇论文[1]中,我们计算了(1+1)维时空中存在反方阱势的质量Dirac场的Casimir能量,并证明了Casimir能量是正的。结果表明,这一结果违反了量子场论的一个关键假设,即真空态是能量最小的状态。这种差异的原因进行检查,并示出有关的电荷密度运营商的定义方式。如果使用点分裂定义电荷密度算符,则将向电荷添加额外项,这将导致卡西米尔能量为负。

英文摘要:

In a recent paper [1] the Casimir energy was calculated for a massive dirac field in (1+1) dimensional space-time in the presence of an inverse square well potential and shown to be positive. It will be shown that this result violates a key assumption of quantum field theory which is that the vacuum state is the state of minimum energy. The reason for this discrepancy is examined and is shown to be related to the way the charge density operator is defined. If the charge density operator is defined using point splitting then an extra term will be added to the charge which will result in the Casimir energy being negative.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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